Netgear WG111v2 Guia do Utilizador descarregar pdf (Página 69)

User Manual for the NETGEAR 54 Mbps Wireless USB 2.0 Adapter WG111

Wireless Networking Basics B-13

202-10026-01

Figure B-2: 802.1x Authentication Sequence

The AP sends Beacon Frames with WPA information element to the stations in the service set.

Information elements include the required authentication method (802.1x or Pre-shared key) and

the preferred cipher suite (WEP, TKIP, or AES). Probe Responses (AP to station) and Association

Requests (station to AP) also contain WPA information elements.

1. Initial 802.1x communications begin with an unauthenticated supplicant (client device)

attempting to connect with an authenticator (802.11 access point). The client sends an

EAP-start message. This begins a series of message exchanges to authenticate the client.

2. The access point replies with an EAP-request identity message.

Client with a WPA-

enabled wireless

adapter and supplicant

(Win XP, Funk,

Meetinghouse)

For example, a

WPA-enabled AP

For example, a

RADIUS server

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Netgear WG111v2 Guia do Utilizador Página 69